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[downloader/mhtml] Add new downloader (#343)

Browse source 
This downloader is intended to be used for streams that consist of a
timed sequence of stand-alone images, such as slideshows or thumbnail
streams

This can be used for implementing:

https://github.com/ytdl-org/youtube-dl/issues/4974#issue-58006762
https://github.com/ytdl-org/youtube-dl/issues/4540#issuecomment-69574231
https://github.com/ytdl-org/youtube-dl/pull/11185#issuecomment-335554239

https://github.com/ytdl-org/youtube-dl/issues/9868
https://github.com/ytdl-org/youtube-dl/pull/14951


Authored by: fstirlitz
This commit is contained in:
felix 2021-05-23 18:34:49 +02:00 committed by pukkandan
parent 4d85fbbdbb
commit cdb19aa4c2
No known key found for this signature in database
GPG key ID: 0F00D95A001F4698
Notes: pukkandan 2021-06-13 22:41:29 +05:30 
This also adds extracting storyboards from DASH manifest as mhtml
6 changed files with 248 additions and 16 deletions
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2
yt_dlp/downloader/__init__.py
View file

@ -22,6 +22,7 @@ def _get_real_downloader(info_dict, protocol=None, *args, **kwargs):
from .rtmp import RtmpFD
from .rtsp import RtspFD
from .ism import IsmFD
from .mhtml import MhtmlFD
from .niconico import NiconicoDmcFD
from .youtube_live_chat import YoutubeLiveChatReplayFD
from .external import (
@ -39,6 +40,7 @@ def _get_real_downloader(info_dict, protocol=None, *args, **kwargs):
'f4m': F4mFD,
'http_dash_segments': DashSegmentsFD,
'ism': IsmFD,
'mhtml': MhtmlFD,
'niconico_dmc': NiconicoDmcFD,
'youtube_live_chat_replay': YoutubeLiveChatReplayFD,
}

202
yt_dlp/downloader/mhtml.py Normal file
View file

@ -0,0 +1,202 @@
# coding: utf-8
from __future__ import unicode_literals
import io
import quopri
import re
import uuid
from .fragment import FragmentFD
from ..utils import (
escapeHTML,
formatSeconds,
srt_subtitles_timecode,
urljoin,
)
from ..version import __version__ as YT_DLP_VERSION
class MhtmlFD(FragmentFD):
FD_NAME = 'mhtml'
_STYLESHEET = """\
html, body {
margin: 0;
padding: 0;
height: 100vh;
}
html {
overflow-y: scroll;
scroll-snap-type: y mandatory;
}
body {
scroll-snap-type: y mandatory;
display: flex;
flex-flow: column;
}
body > figure {
max-width: 100vw;
max-height: 100vh;
scroll-snap-align: center;
}
body > figure > figcaption {
text-align: center;
height: 2.5em;
}
body > figure > img {
display: block;
margin: auto;
max-width: 100%;
max-height: calc(100vh - 5em);
}
"""
_STYLESHEET = re.sub(r'\s+', ' ', _STYLESHEET)
_STYLESHEET = re.sub(r'\B \B|(?<=[\w\-]) (?=[^\w\-])|(?<=[^\w\-]) (?=[\w\-])', '', _STYLESHEET)
@staticmethod
def _escape_mime(s):
return '=?utf-8?Q?' + (b''.join(
bytes((b,)) if b >= 0x20 else b'=%02X' % b
for b in quopri.encodestring(s.encode('utf-8'), header=True)
)).decode('us-ascii') + '?='
def _gen_cid(self, i, fragment, frag_boundary):
return '%u.%s@yt-dlp.github.io.invalid' % (i, frag_boundary)
def _gen_stub(self, *, fragments, frag_boundary, title):
output = io.StringIO()
output.write((
'<!DOCTYPE html>'
'<html>'
'<head>'
'' '<meta name="generator" content="yt-dlp {version}">'
'' '<title>{title}</title>'
'' '<style>{styles}</style>'
'<body>'
).format(
version=escapeHTML(YT_DLP_VERSION),
styles=self._STYLESHEET,
title=escapeHTML(title)
))
t0 = 0
for i, frag in enumerate(fragments):
output.write('<figure>')
try:
t1 = t0 + frag['duration']
output.write((
'<figcaption>Slide #{num}: {t0} – {t1} (duration: {duration})</figcaption>'
).format(
num=i + 1,
t0=srt_subtitles_timecode(t0),
t1=srt_subtitles_timecode(t1),
duration=formatSeconds(frag['duration'], msec=True)
))
except (KeyError, ValueError, TypeError):
t1 = None
output.write((
'<figcaption>Slide #{num}</figcaption>'
).format(num=i + 1))
output.write('<img src="cid:{cid}">'.format(
cid=self._gen_cid(i, frag, frag_boundary)))
output.write('</figure>')
t0 = t1
return output.getvalue()
def real_download(self, filename, info_dict):
fragment_base_url = info_dict.get('fragment_base_url')
fragments = info_dict['fragments'][:1] if self.params.get(
'test', False) else info_dict['fragments']
title = info_dict['title']
origin = info_dict['webpage_url']
ctx = {
'filename': filename,
'total_frags': len(fragments),
}
self._prepare_and_start_frag_download(ctx)
extra_state = ctx.setdefault('extra_state', {
'header_written': False,
'mime_boundary': str(uuid.uuid4()).replace('-', ''),
})
frag_boundary = extra_state['mime_boundary']
if not extra_state['header_written']:
stub = self._gen_stub(
fragments=fragments,
frag_boundary=frag_boundary,
title=title
)
ctx['dest_stream'].write((
'MIME-Version: 1.0\r\n'
'From: <nowhere@yt-dlp.github.io.invalid>\r\n'
'To: <nowhere@yt-dlp.github.io.invalid>\r\n'
'Subject: {title}\r\n'
'Content-type: multipart/related; '
'' 'boundary="{boundary}"; '
'' 'type="text/html"\r\n'
'X.yt-dlp.Origin: {origin}\r\n'
'\r\n'
'--{boundary}\r\n'
'Content-Type: text/html; charset=utf-8\r\n'
'Content-Length: {length}\r\n'
'\r\n'
'{stub}\r\n'
).format(
origin=origin,
boundary=frag_boundary,
length=len(stub),
title=self._escape_mime(title),
stub=stub
).encode('utf-8'))
extra_state['header_written'] = True
for i, fragment in enumerate(fragments):
if (i + 1) <= ctx['fragment_index']:
continue
fragment_url = urljoin(fragment_base_url, fragment['path'])
success, frag_content = self._download_fragment(ctx, fragment_url, info_dict)
if not success:
continue
mime_type = b'image/jpeg'
if frag_content.startswith(b'\x89PNG\r\n\x1a\n'):
mime_type = b'image/png'
if frag_content.startswith((b'GIF87a', b'GIF89a')):
mime_type = b'image/gif'
if frag_content.startswith(b'RIFF') and frag_content[8:12] == 'WEBP':
mime_type = b'image/webp'
frag_header = io.BytesIO()
frag_header.write(
b'--%b\r\n' % frag_boundary.encode('us-ascii'))
frag_header.write(
b'Content-ID: <%b>\r\n' % self._gen_cid(i, fragment, frag_boundary).encode('us-ascii'))
frag_header.write(
b'Content-type: %b\r\n' % mime_type)
frag_header.write(
b'Content-length: %u\r\n' % len(frag_content))
frag_header.write(
b'Content-location: %b\r\n' % fragment_url.encode('us-ascii'))
frag_header.write(
b'X.yt-dlp.Duration: %f\r\n' % fragment['duration'])
frag_header.write(b'\r\n')
self._append_fragment(
ctx, frag_header.getvalue() + frag_content + b'\r\n')
ctx['dest_stream'].write(
b'--%b--\r\n\r\n' % frag_boundary.encode('us-ascii'))
self._finish_frag_download(ctx)
return True

6
yt_dlp/extractor/canvas.py
View file

@ -24,7 +24,7 @@ class CanvasIE(InfoExtractor):
_VALID_URL = r'https?://mediazone\.vrt\.be/api/v1/(?P<site_id>canvas|een|ketnet|vrt(?:video|nieuws)|sporza|dako)/assets/(?P<id>[^/?#&]+)'
_TESTS = [{
'url': 'https://mediazone.vrt.be/api/v1/ketnet/assets/md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
'md5': '68993eda72ef62386a15ea2cf3c93107',
'md5': '37b2b7bb9b3dcaa05b67058dc3a714a9',
'info_dict': {
'id': 'md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
'display_id': 'md-ast-4ac54990-ce66-4d00-a8ca-9eac86f4c475',
@ -32,9 +32,9 @@ class CanvasIE(InfoExtractor):
'title': 'Nachtwacht: De Greystook',
'description': 'Nachtwacht: De Greystook',
'thumbnail': r're:^https?://.*\.jpg$',
'duration': 1468.04,
'duration': 1468.02,
},
'expected_warnings': ['is not a supported codec', 'Unknown MIME type'],
'expected_warnings': ['is not a supported codec'],
}, {
'url': 'https://mediazone.vrt.be/api/v1/canvas/assets/mz-ast-5e5f90b6-2d72-4c40-82c2-e134f884e93e',
'only_matching': True,

29
yt_dlp/extractor/common.py
View file

@ -2126,6 +2126,7 @@ def extract_media(x_media_line):
format_id.append(str(format_index))
f = {
'format_id': '-'.join(format_id),
'format_note': name,
'format_index': format_index,
'url': manifest_url,
'manifest_url': m3u8_url,
@ -2637,7 +2638,7 @@ def extract_Initialization(source):
mime_type = representation_attrib['mimeType']
content_type = representation_attrib.get('contentType', mime_type.split('/')[0])
if content_type in ('video', 'audio', 'text'):
if content_type in ('video', 'audio', 'text') or mime_type == 'image/jpeg':
base_url = ''
for element in (representation, adaptation_set, period, mpd_doc):
base_url_e = element.find(_add_ns('BaseURL'))
@ -2654,9 +2655,15 @@ def extract_Initialization(source):
url_el = representation.find(_add_ns('BaseURL'))
filesize = int_or_none(url_el.attrib.get('{http://youtube.com/yt/2012/10/10}contentLength') if url_el is not None else None)
bandwidth = int_or_none(representation_attrib.get('bandwidth'))
if representation_id is not None:
format_id = representation_id
else:
format_id = content_type
if mpd_id:
format_id = mpd_id + '-' + format_id
if content_type in ('video', 'audio'):
f = {
'format_id': '%s-%s' % (mpd_id, representation_id) if mpd_id else representation_id,
'format_id': format_id,
'manifest_url': mpd_url,
'ext': mimetype2ext(mime_type),
'width': int_or_none(representation_attrib.get('width')),
@ -2676,6 +2683,17 @@ def extract_Initialization(source):
'manifest_url': mpd_url,
'filesize': filesize,
}
elif mime_type == 'image/jpeg':
# See test case in VikiIE
# https://www.viki.com/videos/1175236v-choosing-spouse-by-lottery-episode-1
f = {
'format_id': format_id,
'ext': 'mhtml',
'manifest_url': mpd_url,
'format_note': 'DASH storyboards (jpeg)',
'acodec': 'none',
'vcodec': 'none',
}
representation_ms_info = extract_multisegment_info(representation, adaption_set_ms_info)
def prepare_template(template_name, identifiers):
@ -2694,7 +2712,8 @@ def prepare_template(template_name, identifiers):
t += c
# Next, $...$ templates are translated to their
# %(...) counterparts to be used with % operator
t = t.replace('$RepresentationID$', representation_id)
if representation_id is not None:
t = t.replace('$RepresentationID$', representation_id)
t = re.sub(r'\$(%s)\$' % '|'.join(identifiers), r'%(\1)d', t)
t = re.sub(r'\$(%s)%%([^$]+)\$' % '|'.join(identifiers), r'%(\1)\2', t)
t.replace('$$', '$')
@ -2811,7 +2830,7 @@ def add_segment_url():
'url': mpd_url or base_url,
'fragment_base_url': base_url,
'fragments': [],
'protocol': 'http_dash_segments',
'protocol': 'http_dash_segments' if mime_type != 'image/jpeg' else 'mhtml',
})
if 'initialization_url' in representation_ms_info:
initialization_url = representation_ms_info['initialization_url']
@ -2822,7 +2841,7 @@ def add_segment_url():
else:
# Assuming direct URL to unfragmented media.
f['url'] = base_url
if content_type in ('video', 'audio'):
if content_type in ('video', 'audio') or mime_type == 'image/jpeg':
formats.append(f)
elif content_type == 'text':
subtitles.setdefault(lang or 'und', []).append(f)

5
yt_dlp/extractor/viki.py
View file

@ -142,6 +142,7 @@ class VikiIE(VikiBaseIE):
IE_NAME = 'viki'
_VALID_URL = r'%s(?:videos|player)/(?P<id>[0-9]+v)' % VikiBaseIE._VALID_URL_BASE
_TESTS = [{
'note': 'Free non-DRM video with storyboards in MPD',
'url': 'https://www.viki.com/videos/1175236v-choosing-spouse-by-lottery-episode-1',
'info_dict': {
'id': '1175236v',
@ -155,7 +156,6 @@ class VikiIE(VikiBaseIE):
'params': {
'format': 'bestvideo',
},
'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
}, {
'url': 'http://www.viki.com/videos/1023585v-heirs-episode-14',
'info_dict': {
@ -173,7 +173,6 @@ class VikiIE(VikiBaseIE):
'format': 'bestvideo',
},
'skip': 'Blocked in the US',
'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
}, {
# clip
'url': 'http://www.viki.com/videos/1067139v-the-avengers-age-of-ultron-press-conference',
@ -225,7 +224,6 @@ class VikiIE(VikiBaseIE):
'params': {
'format': 'bestvideo',
},
'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
}, {
# youtube external
'url': 'http://www.viki.com/videos/50562v-poor-nastya-complete-episode-1',
@ -264,7 +262,6 @@ class VikiIE(VikiBaseIE):
'params': {
'format': 'bestvideo',
},
'expected_warnings': ['Unknown MIME type image/jpeg in DASH manifest'],
}]
def _real_extract(self, url):

20
yt_dlp/utils.py
View file

@ -2244,6 +2244,17 @@ def unescapeHTML(s):
r'&([^&;]+;)', lambda m: _htmlentity_transform(m.group(1)), s)
def escapeHTML(text):
return (
text
.replace('&', '&amp;')
.replace('<', '&lt;')
.replace('>', '&gt;')
.replace('"', '&quot;')
.replace("'", '&#39;')
)
def process_communicate_or_kill(p, *args, **kwargs):
try:
return p.communicate(*args, **kwargs)
@ -2323,13 +2334,14 @@ def decodeOption(optval):
return optval
def formatSeconds(secs, delim=':'):
def formatSeconds(secs, delim=':', msec=False):
if secs > 3600:
return '%d%s%02d%s%02d' % (secs // 3600, delim, (secs % 3600) // 60, delim, secs % 60)
ret = '%d%s%02d%s%02d' % (secs // 3600, delim, (secs % 3600) // 60, delim, secs % 60)
elif secs > 60:
return '%d%s%02d' % (secs // 60, delim, secs % 60)
ret = '%d%s%02d' % (secs // 60, delim, secs % 60)
else:
return '%d' % secs
ret = '%d' % secs
return '%s.%03d' % (ret, secs % 1) if msec else ret
def make_HTTPS_handler(params, **kwargs):